The invention discloses a pressure type membrane bioreactor technique of a suspension bed and a device, which relate to an equipment technique for treating organic wastewater with high concentration and difficult degradation. The invention is characterized in that the device comprises a pressure type membrane bioreactor, jet pressurized aeration equipment and a clean water tank. The pressure typemembrane bioreactor is internally provided with particular suspended carriers which are in homogeneous fluidization in mixed liquor so as to enhance mass transfer of pollutants to a biomembrane; the suspended carriers have diverse microbial morphology and provide environment for growth of particular floras; the jet pressurized aeration equipment overcomes the influence of negative pressure of a jet device on the internal pressure of the bioreactor, improves oxygen transfer efficiency and accelerates degradation rate of microorganisms to organics; the membrane filtration is adopted for water yielding and a water pump is saved due to the difference of internal pressure and external pressure, thus saving cost and energy consumption and realizing good separation of solid and liquid. The bioreactor has compact structure, small occupied area, high efficiency and low energy consumption, has strong adaptability to load change of influent organics and toxic matters, is easy to operate and manage and is particularly applicable to treating organic wastewater with medium and high concentration and difficult degradation.